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4f8d4a38 DD |
1 | /* err.c --- handle errors for RX simulator. |
2 | ||
e2882c85 | 3 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
4f8d4a38 DD |
4 | Contributed by Red Hat, Inc. |
5 | ||
6 | This file is part of the GNU simulators. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | ||
24 | #include "err.h" | |
25 | ||
26 | static unsigned char ee_actions[SIM_ERR_NUM_ERRORS]; | |
27 | ||
28 | static enum execution_error last_error; | |
29 | ||
30 | static void | |
31 | ee_overrides () | |
32 | { | |
33 | /* GCC may initialize a bitfield by reading the uninitialized byte, | |
34 | masking in the bitfield, and writing the byte back out. */ | |
35 | ee_actions[SIM_ERR_READ_UNWRITTEN_BYTES] = SIM_ERRACTION_IGNORE; | |
36 | /* This breaks stack unwinding for exceptions because it leaves | |
37 | MC_PUSHED_PC tags in the unwound stack frames. */ | |
38 | ee_actions[SIM_ERR_CORRUPT_STACK] = SIM_ERRACTION_IGNORE; | |
39 | } | |
40 | ||
41 | void | |
42 | execution_error_init_standalone (void) | |
43 | { | |
44 | int i; | |
45 | ||
46 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
47 | ee_actions[i] = SIM_ERRACTION_EXIT; | |
48 | ||
49 | ee_overrides (); | |
50 | } | |
51 | ||
52 | void | |
53 | execution_error_init_debugger (void) | |
54 | { | |
55 | int i; | |
56 | ||
57 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
58 | ee_actions[i] = SIM_ERRACTION_DEBUG; | |
59 | ||
60 | ee_overrides (); | |
61 | } | |
62 | ||
63 | void | |
64 | execution_error_exit_all (void) | |
65 | { | |
66 | int i; | |
67 | ||
68 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
69 | ee_actions[i] = SIM_ERRACTION_EXIT; | |
70 | } | |
71 | ||
72 | void | |
73 | execution_error_warn_all (void) | |
74 | { | |
75 | int i; | |
76 | ||
77 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
78 | ee_actions[i] = SIM_ERRACTION_WARN; | |
79 | } | |
80 | ||
81 | void | |
82 | execution_error_ignore_all (void) | |
83 | { | |
84 | int i; | |
85 | ||
86 | for (i = 0; i < SIM_ERR_NUM_ERRORS; i++) | |
87 | ee_actions[i] = SIM_ERRACTION_IGNORE; | |
88 | } | |
89 | ||
90 | void | |
91 | execution_error (enum execution_error num, unsigned long address) | |
92 | { | |
93 | if (ee_actions[num] != SIM_ERRACTION_IGNORE) | |
94 | last_error = num; | |
95 | ||
96 | if (ee_actions[num] == SIM_ERRACTION_EXIT | |
97 | || ee_actions[num] == SIM_ERRACTION_WARN) | |
98 | { | |
99 | switch (num) | |
100 | { | |
101 | case SIM_ERR_READ_UNWRITTEN_PAGES: | |
102 | case SIM_ERR_READ_UNWRITTEN_BYTES: | |
103 | printf("Read from unwritten memory at 0x%lx\n", address); | |
104 | break; | |
105 | ||
106 | case SIM_ERR_NULL_POINTER_DEREFERENCE: | |
107 | printf ("NULL pointer dereference\n"); | |
108 | break; | |
109 | ||
110 | case SIM_ERR_CORRUPT_STACK: | |
111 | printf ("Stack corruption detected at 0x%lx\n", address); | |
112 | break; | |
113 | ||
114 | default: | |
115 | printf ("Unknown execution error %d\n", num); | |
116 | exit (1); | |
117 | } | |
118 | } | |
119 | ||
120 | if (ee_actions[num] == SIM_ERRACTION_EXIT) | |
121 | exit (1); | |
122 | } | |
123 | ||
124 | enum execution_error | |
125 | execution_error_get_last_error (void) | |
126 | { | |
127 | return last_error; | |
128 | } | |
129 | ||
130 | void | |
131 | execution_error_clear_last_error (void) | |
132 | { | |
133 | last_error = SIM_ERR_NONE; | |
134 | } | |
135 | ||
136 | void | |
137 | execution_error_set_action (enum execution_error num, enum execution_error_action act) | |
138 | { | |
139 | ee_actions[num] = act; | |
140 | } |